From 87205c16f063cb543a2b16952125cd73b4923bd4 Mon Sep 17 00:00:00 2001
From: Daniel Schubert <mail@schubertdaniel.de>
Date: Tue, 8 Jan 2019 13:08:27 +0100
Subject: [PATCH] 5 WIP

---
 4.html                                       |   2 +-
 5.html                                       | 126 ++++++++++++++++---
 beispiele/{ => 4}/archive-dir.sh             |   0
 beispiele/{ => 4}/create_files_with_space.sh |   0
 beispiele/{ => 4}/finduser.sh                |   0
 beispiele/{ => 4}/mysystem.sh                |   0
 beispiele/{ => 4}/recursive-grep-in-file.sh  |   0
 beispiele/{ => 4}/remove-spaces.sh           |   0
 beispiele/4/rename-jpg.sh                    |  17 +++
 beispiele/5/01-vars.sh                       |   8 ++
 beispiele/5/02-comments.sh                   |  10 ++
 beispiele/5/recursive-func.sh                |  28 +++++
 beispiele/5/while-menu.sh                    |  27 ++++
 notes.txt                                    |  19 ---
 14 files changed, 201 insertions(+), 36 deletions(-)
 rename beispiele/{ => 4}/archive-dir.sh (100%)
 rename beispiele/{ => 4}/create_files_with_space.sh (100%)
 rename beispiele/{ => 4}/finduser.sh (100%)
 rename beispiele/{ => 4}/mysystem.sh (100%)
 mode change 100644 => 100755
 rename beispiele/{ => 4}/recursive-grep-in-file.sh (100%)
 rename beispiele/{ => 4}/remove-spaces.sh (100%)
 create mode 100644 beispiele/4/rename-jpg.sh
 create mode 100644 beispiele/5/01-vars.sh
 create mode 100644 beispiele/5/02-comments.sh
 create mode 100644 beispiele/5/recursive-func.sh
 create mode 100644 beispiele/5/while-menu.sh
 delete mode 100644 notes.txt

diff --git a/4.html b/4.html
index 9dc58f9..30817c6 100644
--- a/4.html
+++ b/4.html
@@ -219,7 +219,7 @@ USER     Benutzername</code></pre>
 		        </section>
 
 
-  				<section style="font-size: .6em">
+  				<section style="font-size: .7em">
 		        	<pre><code>#!/bin/bash
 clear
 echo "Diese Infos werden von mysystem.sh bereitgestellt."
diff --git a/5.html b/5.html
index f523418..03bfec7 100644
--- a/5.html
+++ b/5.html
@@ -40,7 +40,7 @@
 				<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
 					<h1>LINUX</h1>
 					<h3>Das universelle Betriebssystem</h3>
-					<p>Eine Einführung - Teil 4
+					<p>Eine Einführung - Teil 5
 					<p>
 						<small>Deutsche Angestellten Akademie</small>
 					</p>
@@ -51,25 +51,119 @@
 				</section>
 				
 				<section>
-					<h2>vim und emacs</h2>
-					<h3>Die mächtigen Unix Editoren</h3>
+					<h2>Bash scripting - Fortsetzung</h2>
 				</section>
 
-				<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
-					<h3>vim</h3>
-          <ul>
-            <li class="fragment">ein Editor für die shell </li>
-            <li class="fragment">immer da, oft in der alten Variante „vi“ </li>
-            <li class="fragment">Vi IMproved</li>
-            <li class="fragment">komplett per Kürzel steuerbar </li>
-            <li class="fragment">umfassend anpassbar </li>
-            <li class="fragment">erweiterbar </li>
-            <li class="fragment">syntax highlighting </li>
-            <li class="fragment">vim ist einfach cool ;-)</li>
-          </ul>
-            
+				<section>
+					<h3>LINKS</h3>
+
+					<p>http://tldp.org/LDP/abs/html/complexfunct.html
+
+					<p>http://programmingexamples.wikidot.com/bash-scripting#toc24
+
+					<p>https://wiki.ubuntuusers.de/Shell/Bash-Skripting-Guide_für_Anfänger/#Quoting
+
+					<div>
+					- script kontrolle ( strg-z etc )
+					- input 
+					- parameter
+					- functions
+					
+					- kontrollstrukturen
+					- 
+
 				</section>
 
+
+				<section>
+					<h3>Variablen</h3>
+					<pre><code>#!/bin/bash
+ 
+x=10            #NICHT x = 10 -> keine Leerzeichen!
+X=20            #variablen sind Case Sensitive
+$y=             #NULL variable
+echo "x = $x"
+echo "X = $X"
+echo "y = $y"</code></pre>
+				</section>
+
+				<section>
+					<h3>Kommentare</h3>
+					<pre><code>
+#!/bin/bash
+# Diese Zeile ist ein Kommentar
+echo "A comment will follow." # Comment here.
+echo "The # here does not begin a comment."
+echo 'The # here does not begin a comment.'
+echo The \# here does not begin a comment.
+echo The # here begins a comment.
+ 
+echo ${PATH#*:}       # Parameter substitution, not a comment.
+echo $(( 2#101011 ))  # Base conversion, not a comment.
+					</code>
+					</pre>
+				</section>
+
+				<section>
+					<h3>Quotes</h3>
+
+					<ul>
+						<li class="fragment ">Double Quotes: " " -Anything enclose in double quotes removed meaning of that characters (except \ and $).</li>
+						<li class="fragment ">Single quotes: ' ' - Enclosed in single quotes remains unchanged.</li>
+						<li class="fragment ">Back quote: ` ` - To execute command</li>
+					</ul>
+				</section>
+
+				<section>
+					<h3>Input - Output redirection</h3>
+
+<ul>
+	<li class="fragment "> > : output in Datei. Best. Datei wird überschrieben!</li>
+	<li class="fragment "> >> : output an Datei anhängen.</li>
+	<li class="fragment "> < : Kommando Input aus Datei lesen</li>
+</ul>
+						<pre><code>#!/bin/bash
+echo "ls > file_list"
+ls > file_list
+ 
+echo "ls -la >> file_list"
+ls -la >> file_list
+ 
+echo "cat < file_list"
+cat < file_list</code></pre>
+
+						
+				</section>
+				<section>
+					- arithmetik
+
+					let "m = 4 * 1024";echo $m
+
+					let "m += 15"
+					let "m -= 3"
+					let "m /= 5"
+					let "m %= 10"
+					let "m++"
+					let "m--"
+
+					let "k = (m < 9) ? 0 : 1"
+					condition ? value-if-true : value-if-false
+
+					Floating Poin:
+					echo "32.0 + 1.4" | bc 
+
+					echo `expr $m + 18`
+					m=`expr $m + 18`
+
+					(( m *= 4 ))
+
+				</section>
+				<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
+       
+				</section>
+
+
+
         <section>
           <h3>Die 5 Level eines Vim Magiers</h3>
           <ul>
diff --git a/beispiele/archive-dir.sh b/beispiele/4/archive-dir.sh
similarity index 100%
rename from beispiele/archive-dir.sh
rename to beispiele/4/archive-dir.sh
diff --git a/beispiele/create_files_with_space.sh b/beispiele/4/create_files_with_space.sh
similarity index 100%
rename from beispiele/create_files_with_space.sh
rename to beispiele/4/create_files_with_space.sh
diff --git a/beispiele/finduser.sh b/beispiele/4/finduser.sh
similarity index 100%
rename from beispiele/finduser.sh
rename to beispiele/4/finduser.sh
diff --git a/beispiele/mysystem.sh b/beispiele/4/mysystem.sh
old mode 100644
new mode 100755
similarity index 100%
rename from beispiele/mysystem.sh
rename to beispiele/4/mysystem.sh
diff --git a/beispiele/recursive-grep-in-file.sh b/beispiele/4/recursive-grep-in-file.sh
similarity index 100%
rename from beispiele/recursive-grep-in-file.sh
rename to beispiele/4/recursive-grep-in-file.sh
diff --git a/beispiele/remove-spaces.sh b/beispiele/4/remove-spaces.sh
similarity index 100%
rename from beispiele/remove-spaces.sh
rename to beispiele/4/remove-spaces.sh
diff --git a/beispiele/4/rename-jpg.sh b/beispiele/4/rename-jpg.sh
new file mode 100644
index 0000000..ab02b03
--- /dev/null
+++ b/beispiele/4/rename-jpg.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+suf=$1
+if [ $# -gt 0 ]
+	then
+		for f in *.$suf; do
+		    bn=`basename "$f" .$suf |  sed 's/IMG_//'`
+			new=$bn.$suf
+			echo "neuer Dateiname:"
+			echo $new
+			mv "$f" $new
+		done
+	else
+		echo "Kein Suffix gegeben!!"
+		echo "Verwendung: strip-space.sh SUFFIX"
+		echo "Beende ...."
+		exit 1
+fi
diff --git a/beispiele/5/01-vars.sh b/beispiele/5/01-vars.sh
new file mode 100644
index 0000000..ec5754d
--- /dev/null
+++ b/beispiele/5/01-vars.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+ 
+x=10            #NOT x = 10 no spaces
+X=20            #variables are case sensitive
+$y=             #NULL variable
+echo "x = $x"
+echo "X = $X"
+echo "y = $y"
\ No newline at end of file
diff --git a/beispiele/5/02-comments.sh b/beispiele/5/02-comments.sh
new file mode 100644
index 0000000..545a056
--- /dev/null
+++ b/beispiele/5/02-comments.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+# This line is a comment.
+echo "A comment will follow." # Comment here.
+echo "The # here does not begin a comment."
+echo 'The # here does not begin a comment.'
+echo The \# here does not begin a comment.
+echo The # here begins a comment.
+ 
+echo ${PATH#*:}       # Parameter substitution, not a comment.
+echo $(( 2#101011 ))  # Base conversion, not a comment.
\ No newline at end of file
diff --git a/beispiele/5/recursive-func.sh b/beispiele/5/recursive-func.sh
new file mode 100644
index 0000000..2056e9e
--- /dev/null
+++ b/beispiele/5/recursive-func.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Beispiel für Rekursive Funktion
+
+#Funktions-Definition
+function sum() {
+    if [ -z "$2" ]; then
+
+        #Rückgabewert
+        echo $1
+
+    else
+        a=$1;
+        
+        #Parameter werden nach links verschoben : orkus  <- $1 , $1 <- $2 
+        shift;
+        
+        #Funktion ruft sich selbst auf - Rekursion
+        #Ergebnis. b == 2
+        b=`sum $@`
+
+
+        echo `expr $a + $b` # <- 1 + 2 
+    fi
+}
+
+# Funktions-Aufruf mit 2 Parametern
+sum 1 2
diff --git a/beispiele/5/while-menu.sh b/beispiele/5/while-menu.sh
new file mode 100644
index 0000000..404e92a
--- /dev/null
+++ b/beispiele/5/while-menu.sh
@@ -0,0 +1,27 @@
+# Script to create simple menus and take action according to that selected
+# menu item
+#
+while :
+ do
+    clear
+    echo "-------------------------------------"
+    echo " Main Menu "
+    echo "-------------------------------------"
+    echo "[1] Show Todays date/time"
+    echo "[2] Show files in current directory"
+    echo "[3] Show calendar"
+    echo "[4] Start editor to write letters"
+    echo "[5] Exit/Stop"
+    echo "======================="
+    echo -n "Enter your menu choice [1-5]: "
+    read yourch
+    case $yourch in
+      1) echo "Today is `date` , press a key. . ." ; read ;;
+      2) echo "Files in `pwd`" ; ls -l ; echo "Press a key. . ." ; read ;;
+      3) cal ; echo "Press a key. . ." ; read ;;
+      4) vi ;;
+      5) exit 0 ;;
+      *) echo "Opps!!! Please select choice 1,2,3,4, or 5";
+         echo "Press a key. . ." ; read ;;
+ esac
+done
\ No newline at end of file
diff --git a/notes.txt b/notes.txt
deleted file mode 100644
index 7e3a93c..0000000
--- a/notes.txt
+++ /dev/null
@@ -1,19 +0,0 @@
- wiederholugn
-
-regexp
-
-bash config
-
-scripting
-
-
-
-cp `find . -name "*.jpg"` neuer_ordner
-
-
-for FILE in *.JPG
-do
-  NEWFILE2=`echo "$FILE" | sed 's/.(*)/\-/'` 
-  echo "$NEWFILE2"
-  mv "$FILE" "$NEWFILE2"  
-done